[Beignet] [PATCH 2/2] test function "smoothstep"

[Zhigang Gong]

Tested ok, pushed, thanks.

On Tue, Jul 09, 2013 at 09:41:59AM +0800, Homer Hsing wrote:
> 
> Signed-off-by: Homer Hsing <homer.xing at intel.com>
> ---
>  kernels/compiler_smoothstep.cl |  4 +++
>  utests/CMakeLists.txt          |  1 +
>  utests/compiler_smoothstep.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 63 insertions(+)
>  create mode 100644 kernels/compiler_smoothstep.cl
>  create mode 100644 utests/compiler_smoothstep.cpp
> 
> diff --git a/kernels/compiler_smoothstep.cl b/kernels/compiler_smoothstep.cl
> new file mode 100644
> index 0000000..d3b7da4
> --- /dev/null
> +++ b/kernels/compiler_smoothstep.cl
> @@ -0,0 +1,4 @@
> +kernel void compiler_smoothstep(global float *src1, global float *src2, global float *src3, global float *dst) {
> +  int i = get_global_id(0);
> +  dst[i] = smoothstep(src1[i], src2[i], src3[i]);
> +}
> diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
> index 621acad..26c0540 100644
> --- a/utests/CMakeLists.txt
> +++ b/utests/CMakeLists.txt
> @@ -67,6 +67,7 @@ set (utests_sources
>    compiler_saturate_sub.cpp
>    compiler_shift_right.cpp
>    compiler_short_scatter.cpp
> +  compiler_smoothstep.cpp
>    compiler_uint2_copy.cpp
>    compiler_uint3_copy.cpp
>    compiler_uint8_copy.cpp
> diff --git a/utests/compiler_smoothstep.cpp b/utests/compiler_smoothstep.cpp
> new file mode 100644
> index 0000000..760063b
> --- /dev/null
> +++ b/utests/compiler_smoothstep.cpp
> @@ -0,0 +1,58 @@
> +#include <cmath>
> +#include "utest_helper.hpp"
> +
> +float cpu(float e0, float e1, float x)
> +{
> +  x = (x - e0) / (e1 - e0);
> +  if (x >= 1)
> +    x = 1.f;
> +  if (x <= 0)
> +    x = 0.f;
> +  return x * x * (3 - 2 * x);
> +}
> +
> +void compiler_smoothstep(void)
> +{
> +  const int n = 32;
> +  float src1[n], src2[n], src3[n];
> +
> +  // Setup kernel and buffers
> +  OCL_CREATE_KERNEL("compiler_smoothstep");
> +  OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(float), NULL);
> +  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
> +  OCL_CREATE_BUFFER(buf[2], 0, n * sizeof(float), NULL);
> +  OCL_CREATE_BUFFER(buf[3], 0, n * sizeof(float), NULL);
> +  OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
> +  OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
> +  OCL_SET_ARG(2, sizeof(cl_mem), &buf[2]);
> +  OCL_SET_ARG(3, sizeof(cl_mem), &buf[3]);
> +  globals[0] = n;
> +  locals[0] = 16;
> +
> +  OCL_MAP_BUFFER(0);
> +  OCL_MAP_BUFFER(1);
> +  OCL_MAP_BUFFER(2);
> +  for (int i = 0; i < n; ++i) {
> +    float a = 0.1f * (rand() & 15) - 0.75f;
> +    float b = a + 0.1f * (rand() & 15);
> +    float c = 0.1f * (rand() & 15) - 0.75f;
> +    src1[i] = ((float*)buf_data[0])[i] = a;
> +    src2[i] = ((float*)buf_data[1])[i] = b;
> +    src3[i] = ((float*)buf_data[2])[i] = c;
> +  }
> +  OCL_UNMAP_BUFFER(0);
> +  OCL_UNMAP_BUFFER(1);
> +  OCL_UNMAP_BUFFER(2);
> +
> +  OCL_NDRANGE(1);
> +
> +  OCL_MAP_BUFFER(3);
> +  for (int i = 0; i < n; ++i) {
> +    float a = ((float*)buf_data[3])[i];
> +    float b = cpu(src1[i], src2[i], src3[i]);
> +    OCL_ASSERT(fabsf(a - b) < 1e-4f);
> +  }
> +  OCL_UNMAP_BUFFER(3);
> +}
> +
> +MAKE_UTEST_FROM_FUNCTION(compiler_smoothstep);
> -- 
> 1.8.1.2
> 
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